Purple sweet potato color repairs d-galactose-induced spatial learning and memory impairment by regulating the expression of synaptic proteins

Purple sweet potato color (PSPC), a class of naturally occurring anthocyanins used to color food (E163), has been reported to possess a variety of biological activities, including anti-oxidant, anti-tumor, and anti-inflammatory. The effect of PSPC on the spatial learning and memory of mice treated with d-galactose (d-gal) was evaluated by the Morris water maze; d-gal-treated mice had decreased performance compared with mice in the vehicle and PSPC groups, while the PSPC + d-gal group showed significantly shortened escape latency to platform, increased swimming speed, more target quadrant search time and more platform crossings as compared with the d-gal group. Brain functions, such as memory formation and recovery of function after injury, depend on proper regulation of the expression levels of the pre- and post-synaptic proteins. We investigated the expression of four pre-synaptic proteins (growth-associated protein-43, synapsin-I, synaptophysin, and synaptotagmin) and two post-synaptic proteins (post-synaptic density protein-95 and Ca²⁺/calmodulin-dependent protein kinase II) in the hippocampus and cerebral cortex, respectively, in response to different treatments. Western blotting analysis showed that there were significant decreases in the expression of these representative synaptic proteins in the hippocampus and cerebral cortex of d-gal-treated mice. Interestingly, these decreased expression levels of synaptic proteins could be reversed by PSPC. The levels of expression of these representative synaptic proteins in mice treated with PSPC alone were not significantly different from those in untreated mice. The results of this study suggested that memory impairment and synaptic protein loss in d-gal-treated mice may be improved by treatment with PSPC.     

中学生问题解决策略的基本特征研究

实验通过人—机界面,对中学生解决几何问题策略的基本特征进行探讨。对学习成绩优、差学生,在解决问题的程序上和解决问题结果的正确与错误上的差异比较后显示：学习成绩优、差学生在解决问题的程序上,尤其在问题解决的思考推理方向上没有类似专家和新手之间的显著差异;学习成绩的优、差对解决问题结果的正确与错误上具有直接的影响;问题解决规则的选择对问题解决过程具有间接影响;对问题解决规则的掌握对问题解决的结果具有重要影响。     

外显竞争态度对内隐竞争与合作的影响

通过《竞争态度量表（中国版）》进行测验,选取良性竞争态度和过度竞争态度大学生各60名作为被试。采用偏好判断与再认测验相结合的实验范式,操纵三种不同的加工类型,考察两组被试对竞争动词、合作动词两类刺激的内隐与外显记忆贡献。结果显示：1）过度竞争态度者和良性竞争态度者都具有很强的内隐竞争性;2）过度竞争态度者比良性竞争态度者具有更强的内隐竞争性;3）良性竞争态度者比过度竞争态度者具有更强的内隐合作性。     

注意瞬脱：短暂失控、延迟选择还是资源耗竭？

传统理论认为有限的注意资源分配给前面的靶引起随后靶的认知受损导致注意瞬脱.但新近的理论强调插入在连续靶中的干扰物在AB中的作用.该研究通过比较位于快速序列视觉呈现的数字干扰物中分别由两个字母之间插入1个数字、字母或符号构成的3种3字符在两种不同报告方式下的成绩,对TLC理论和延迟选择理论进行了检验.证明单一理论不能全面解释AB实验现象,提示AB的发生是多种机制共同作用的结果.     

对乙肝患者群体认知的矛盾态度:行为与ERP证据

采用GNAT范式并结合事件相关电位（ERP）,考查不同矛盾状态（高矛盾VS低矛盾）被试对特殊群体的态度及其在行为、脑加工机制上的差异。结果表明：（1）个体对于乙肝患者存在矛盾态度;（2）高、低矛盾被试对乙肝患者的态度差异,主要表现在积极维度而非消极维度上。（3）N270的出现及LPC的差异表明,矛盾态度的加工是个体根据背景对预存性评价予以修正的过程。     

情绪Stroop效应:来自汉字的证据

通过颜色命名和词汇阅读两种作业任务,采用情绪词、中性词两类刺激材料,探索情绪Stroop效应中Stroop加工的特点和机制。结果发现：（1）两种作业任务都发现明显的情绪Stroop效应;（2）两种作业任务中情绪Stroop效应不受情绪词的抽象性影响。它说明情绪stroop效应与经典的Stroop效应是两种独立的现象,前者的加工过程是由于情绪词所产生的情绪威胁而导致反应延迟,而不是经典Stroop效应的选择性注意机制。     

《吕氏春秋》智力观探析

摘 要 《吕氏春秋》关于智力内涵的诠释大大超过前人,它所描述的“知时”、“知化”、“长见”、“察微”、“贵卒”等智力特征与现代智力理论相契合;它提出的“人同类而智殊”、“小智非大智之类”、“智不遇时则无功”、“人之少也愚,其长也智”等观点,充分体现了中国先秦学者的智慧;它关于通过“自反”、学习促进智力发展的主张,对当今教育依然具有重要的参照价值。《吕氏春秋》的智育定位主要是王道,它较少注意先天因素对智力的影响,这是其局限。关键词 吕氏春秋 智力观 个体差异 智力发展     

The effect of brand anthropomorphism,brand distinctiveness,and warmth on brand attitude: A mediated moderation model

Brand anthropomorphism is one of the most widely used marketing strategies, and numerous studies have confirmed the positive effect of anthropomorphism on consumers' brand attitude. However, anthropomorphism does not always produce positive effects in particular conditions. This study focuses on the interaction effect of brand anthropomorphism and brand distinctiveness on brand attitude and tests the mediating effect of warmth and competence using the Stereotype Content Model. The results of two experiments show that brand anthropomorphism positively predicts consumers' brand attitude, and brand position (distinctiveness vs. popularity) moderates this relationship. Anthropomorphism may improve consumers' attitudes when the brand is positioned to be popular but has no effect on consumers' attitudes when the brand is positioned to be distinctive. Additionally, warmth (not competence) mediates the interaction effect of anthropomorphism and brand position on brand attitude. This study expands the extant knowledge on anthropomorphism and stereotypes in the field of consumption psychology and provides marketers with more rational strategies when applying anthropomorphism in marketing campaigns.     

Translating External Knowledge to Team Creativity in Turbulent Environments: The Role of Absorptive Capacity and Knowledge Integration

In seeking to understand factors contributing to team creativity in dynamic environments, we explored the role of external knowledge search on team creativity through absorptive capacity and knowledge integration. We tested our hypotheses with a sample of 96 teams involving 421 employees in China. Results demonstrated that external knowledge search related positively to team creativity, fully mediated by both absorptive capacity and knowledge integration. In addition, environmental dynamism played a moderating role in the relation between external knowledge search and absorptive capacity, as well as in the relation between external knowledge search and knowledge integration. We discussed the implications of these findings for research and practice.     

儿童数学应用题表征水平的特点研究

本研究运用实验法对某普通小学的161名4～6年级学生进行了长方形面积任务和MPI测验,以考察学生的应用题表征水平及其对问题解决的影响.结果表明:(1)表征水平随着年级的升高而不断提高,学生在表征水平上性别差异不显著;(2)无论哪个年级.表征水平都是优等生好于中等生,中等生好于差等生;表征水平越高,学生在问题解决上的成绩越好;(3)随着题目难度的不断加大,各表征水平的学生在解题正确率上的差距也在不断拉大.也就是说,题目越难,表征水平在解题中的作用也就越明显.